It's a one hand gesture with two open fingers, with the index finger and the pinkie sticking upwards and the other three joining in the front. Different from \n/ because no fingers are held to the palm.
It seems to be an Asian gesture, but I have no other clues on what it's called, \y/ is what I think is closest to it.
these are the examples: post #1086770 post #1092513
Updated by jxh2154